Add ocf_datapipes version in configuration

[peterdudfield]

Detailed Description

When saving the configuration, would be great to save the ocf_datapipes version we are using.
We sometimes ue PVnet package to make the batches, so it would be good to lokg this too

Context

• good to know which version we are using

Possible Implementation

• Add two more fields to the congiruation
• ocf_datapipes_version, can be None,
• when saving the configuration, load the version and add this in
• extra_package_version, this could be a json dict, so we can save pvnet=1.0.2 for example

[peterdudfield]

This could be added to General - https://github.com/openclimatefix/ocf_datapipes/blob/main/ocf_datapipes/config/model.py#L64